Inventory of Page Layout Usage in a SharePoint Site

Recently I got a request to find out the usage of page layouts on a large SharePoint site. I Googled and found a few scripts, but none that did all I wanted, e.g. to limit the inventory to a certain sub-site. So I wrote my own one.

function Get-PageLayoutsInUse {
    Add-PSSnapin "Microsoft.SharePoint.PowerShell" -ErrorAction SilentlyContinue
    $objSite = Get-SPSite $SiteUrl
    [Microsoft.Sharepoint.Publishing.PublishingSite]$publishingSite = New-Object Microsoft.SharePoint.Publishing.PublishingSite($objSite)

    $layoutsInUse = @()

    if ([Microsoft.SharePoint.Publishing.PublishingWeb]::IsPublishingWeb($publishingSite.RootWeb) -eq $true)
        $pageLayouts = $publishingSite.GetPageLayouts($false)
        foreach($layout in $pageLayouts)
            Write-Host "Looking for references to " $layout.ServerRelativeUrl

            [Microsoft.SharePoint.SPFile]$file = $publishingSite.RootWeb.GetFile($layout.ServerRelativeUrl);
            if($MatchUrlPart) {
                $links = $file.BackwardLinks | where {$_.ServerRelativeUrl -like $MatchUrlPart }
            else {
                $links = $file.BackwardLinks
            $layoutReportItem = @{Title=$layout.Title;File=$layout.ServerRelativeUrl;Count=$links.Count}
            $newobject = New-Object PSObject -Property $layoutReportItem
            $layoutsInUse += $newobject        
    $a = @{Expression={$_.LayoutName}}

    $layoutsInUse | Sort-Object Count -Descending | Select-Object -Property *

This has been tested in a SharePoint 2013 on-prem farm run locally on a server in the farm. If run from C: it can be used like this and exported to CSV for the entire site:

. C:\Get-PageLayoutsInUse.ps1
Get-PageLayoutsInUse -SiteUrl "" | Export-Csv C:\page\_layouts\_on\_entire\_site.csv –NoTypeInformation

Or for the sub-site Products in English:

. C:\Get-PageLayoutsInUse.ps1
Get-PageLayoutsInUse -SiteUrl "" -MatchUrlPart "\*/en-gb/products/\*" | Export-Csv C:\page\_layouts\_under_products.csv –NoTypeInformation
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